Application area; hotels, offices, business centers, restaurants, hospitals. Gonka screw compressor water cooled liquid chillers, with its models in the range of high efficiency and high capacity, are ideal for cooling operations related to comfort and industrial purposes. R22 , r134a or r407c options. Compressors; self hermetic screw compressors. Compressors changing between 1 and 4 according to cooling capacity. Condenser; highly efficient, easily used and maintained, double mirrored finned copper piped shell- tube condenser. Evaporator; shell- tube evaporator whose cooling liquid side and water side have one-circuit, multiple transitional, two mirrored construction. Cooling circuit; cooling circuit and circuit elements entirely independent for every compressor. Electrical screen and control board; board including switch and micro-processor based controller unit and control cards as well as elements such as systemic control elements and fuse, contactor, thermal magnetic switch and relay. Micro-processor based control system; full control over all the cooling circuits. Connections on board through simplified device failure follow-up and easily recognized electrical diagram. Low noise level. Multiple compressor, multiple cyclical, high efficiency. %25-%100 modulating capacity control in every compressor. Tough construction and long life. Easy handling, installation and service. Compatible with available bms systems. Meeting consumer requirements in the most suitable way through broad accessory and option alternatives. Newly improved use of screw compressor with high cop value. Rational control. Depends model